CVE-2026-13346

Name	CVE-2026-13346
Description	pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be installed to arbitrary locations on disk even when installing wheels. This vulnerability requires downloading or installing a package from a malicious package index to succeed, malicious packages alone are not able to exploit this vulnerability. Note that this vulnerability only materially impacts users running `pip download` with the `--only-binary` option as installing source distributions from an untrusted index is already an unsafe operation that executes code during install time.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1143072

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-pip (PTS)	bullseye	20.3.4-4+deb11u1	vulnerable
	bullseye (security)	20.3.4-4+deb11u2	vulnerable
	bookworm	23.0.1+dfsg-1	vulnerable
	trixie	25.1.1+dfsg-1	vulnerable
	forky, sid	26.1.2+dfsg-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-pip	source	(unstable)	(unfixed)			1143072

Notes

[trixie] - python-pip <no-dsa> (Minor issue)
[bookworm] - python-pip <postponed> (Minor issue)
[bullseye] - python-pip <postponed> (Minor issue)
https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX/
https://github.com/pypa/pip/pull/14110
Fixed by: https://github.com/pypa/pip/commit/10dfb6b9005484578b386f64b9f36982e3dc6679 (26.2)